On 03/24/2015 09:03 AM, Javi Merino wrote:
> Now that the kernel provides DIV_ROUND_CLOSEST_ULL(), drop the internal
> implementation and use the kernel one.
>
> Cc: Mike Turquette <mturquette@xxxxxxxxxx>
> Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> Cc: Alex Elder <elder@xxxxxxxxxx>
Acked-by: Alex Elder <elder@xxxxxxxxxx>
> Signed-off-by: Javi Merino <javi.merino@xxxxxxx>
> ---
> drivers/clk/bcm/clk-kona.c | 28 +++++++---------------------
> drivers/clk/bcm/clk-kona.h | 1 -
> 2 files changed, 7 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/clk/bcm/clk-kona.c b/drivers/clk/bcm/clk-kona.c
> index 05abae89262e..a0ef4f75d457 100644
> --- a/drivers/clk/bcm/clk-kona.c
> +++ b/drivers/clk/bcm/clk-kona.c
> @@ -15,6 +15,7 @@
> #include "clk-kona.h"
>
> #include <linux/delay.h>
> +#include <linux/kernel.h>
>
> /*
> * "Policies" affect the frequencies of bus clocks provided by a
> @@ -51,21 +52,6 @@ static inline u32 bitfield_replace(u32 reg_val, u32 shift, u32 width, u32 val)
>
> /* Divider and scaling helpers */
>
> -/*
> - * Implement DIV_ROUND_CLOSEST() for 64-bit dividend and both values
> - * unsigned. Note that unlike do_div(), the remainder is discarded
> - * and the return value is the quotient (not the remainder).
> - */
> -u64 do_div_round_closest(u64 dividend, unsigned long divisor)
> -{
> - u64 result;
> -
> - result = dividend + ((u64)divisor >> 1);
> - (void)do_div(result, divisor);
> -
> - return result;
> -}
> -
> /* Convert a divider into the scaled divisor value it represents. */
> static inline u64 scaled_div_value(struct bcm_clk_div *div, u32 reg_div)
> {
> @@ -87,7 +73,7 @@ u64 scaled_div_build(struct bcm_clk_div *div, u32 div_value, u32 billionths)
> combined = (u64)div_value * BILLION + billionths;
> combined <<= div->u.s.frac_width;
>
> - return do_div_round_closest(combined, BILLION);
> + return DIV_ROUND_CLOSEST_ULL(combined, BILLION);
> }
>
> /* The scaled minimum divisor representable by a divider */
> @@ -731,7 +717,7 @@ static unsigned long clk_recalc_rate(struct ccu_data *ccu,
> scaled_rate = scale_rate(pre_div, parent_rate);
> scaled_rate = scale_rate(div, scaled_rate);
> scaled_div = divider_read_scaled(ccu, pre_div);
> - scaled_parent_rate = do_div_round_closest(scaled_rate,
> + scaled_parent_rate = DIV_ROUND_CLOSEST_ULL(scaled_rate,
> scaled_div);
> } else {
> scaled_parent_rate = scale_rate(div, parent_rate);
> @@ -743,7 +729,7 @@ static unsigned long clk_recalc_rate(struct ccu_data *ccu,
> * rate.
> */
> scaled_div = divider_read_scaled(ccu, div);
> - result = do_div_round_closest(scaled_parent_rate, scaled_div);
> + result = DIV_ROUND_CLOSEST_ULL(scaled_parent_rate, scaled_div);
>
> return (unsigned long)result;
> }
> @@ -790,7 +776,7 @@ static long round_rate(struct ccu_data *ccu, struct bcm_clk_div *div,
> scaled_rate = scale_rate(pre_div, parent_rate);
> scaled_rate = scale_rate(div, scaled_rate);
> scaled_pre_div = divider_read_scaled(ccu, pre_div);
> - scaled_parent_rate = do_div_round_closest(scaled_rate,
> + scaled_parent_rate = DIV_ROUND_CLOSEST_ULL(scaled_rate,
> scaled_pre_div);
> } else {
> scaled_parent_rate = scale_rate(div, parent_rate);
> @@ -802,7 +788,7 @@ static long round_rate(struct ccu_data *ccu, struct bcm_clk_div *div,
> * the best we can do.
> */
> if (!divider_is_fixed(div)) {
> - best_scaled_div = do_div_round_closest(scaled_parent_rate,
> + best_scaled_div = DIV_ROUND_CLOSEST_ULL(scaled_parent_rate,
> rate);
> min_scaled_div = scaled_div_min(div);
> max_scaled_div = scaled_div_max(div);
> @@ -815,7 +801,7 @@ static long round_rate(struct ccu_data *ccu, struct bcm_clk_div *div,
> }
>
> /* OK, figure out the resulting rate */
> - result = do_div_round_closest(scaled_parent_rate, best_scaled_div);
> + result = DIV_ROUND_CLOSEST_ULL(scaled_parent_rate, best_scaled_div);
>
> if (scaled_div)
> *scaled_div = best_scaled_div;
> diff --git a/drivers/clk/bcm/clk-kona.h b/drivers/clk/bcm/clk-kona.h
> index 2537b3072910..6849a64baf6d 100644
> --- a/drivers/clk/bcm/clk-kona.h
> +++ b/drivers/clk/bcm/clk-kona.h
> @@ -503,7 +503,6 @@ extern struct clk_ops kona_peri_clk_ops;
>
> /* Externally visible functions */
>
> -extern u64 do_div_round_closest(u64 dividend, unsigned long divisor);
> extern u64 scaled_div_max(struct bcm_clk_div *div);
> extern u64 scaled_div_build(struct bcm_clk_div *div, u32 div_value,
> u32 billionths);
>
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